Grinding-disk.



' R. A.' REYNOLDS.

GRINDING DISK. APPLIUATION FILED JUNE 18. 1913.

' 1,109,361, Patented Sept.,1.1914.

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{HVENTOR WMWW W lfr'rong UNiTEn sTATEs rATENT oEEi EoEEza'r A.y REYNOLDS, 0E PORT rin-Eon, nionienn.

GRINDING-DISK.

To all whom it may concern.'

Be it known that I, 'ROBERT A.r BEYiIoLDS, a citizen of the United States, residing at Port Huron, county of St; Clair, Staterof Michigan, have invented a certain new and useful Improvement in Grinding-Disks, and declare the following to be a full, clear, and eXact description of the same, such as will enable othersvskilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form apart of this specification.y

This invention relates to grinding disks and has for its object a grinding disk which may be run in either direction and which has a grinding surface on either side. c

A further feature is a progressively increased height of the baiiies from the center of the disk to the periphery whereby the grain as it progresses toward the periphery of the ydisk is brought into a more intimate relation with the cutting surfaces.

A still furthervfeature is a balancing ring Y and lugsl which are part of the casting and which may be trimmed 0E to balance the disk upon its arbor.

In the drawings: Figure 1, is a plan view of the disk. Fig. 2, is a section on the line A-A of Fig. 1.

The grinding disk is a single casting which is formed with dividing ribs that arelradial. Between two dividing ribs a are a number of ribs Z that run parallel with the radial dividing ribs, an equal number running parallel with each dividing rib. This arrangement causes a number of the ribs to meet at acute angles as at l). It will be noted that each side of the ribs are the same and that the sides are comparatively steep. The dividing ribs a extend to the opening in the center of the disk, flattening out to form wings c that catch the Specication of Letters Patent.

@Ef i' Patented Sept. 1, 1914:.y

Application iiled J une 18, 1913. Serial No. 774,299. J

posed which is also` capable of beingrun in y either direction. K

Baies e are arranged betweenadjoming ribs to force the grain up where it may beI caught by the sheering edges of the ribs.

These baiiies e are staggered inadjacent y.

grooves. The bafies gradually increase in height from the center to the periphery of p the disk. This arrangement forces the grain into more intimate relation with the cutting surfaces of ythe two disks as the grain works vfrom the center outward, hence there is a gradual reduction of the grain from a coarse'condition to a fine condition.

On the outside of thel casting that forms the disk is an extension or balancing ring f and onthis 'are still further extensions or lugs g. Before the grinding disk is placed in the grinding head, it is centered, that is,

the `grinding disk is placed .upon an arbor and adjusted thereto so as to balance. The lugs g are then trimmedk olf by an emery wheel or other means'so as to make the periphery of the disk concentric with the new center that has been established in order to secure a balance. This will make the grinding disk t into the head, but the material trimmed off of the lugs will again throw the disk slightly out of balance. This 'balance may be restored by trimming the balancing ring. This trimming of the balancing ring may take place after the disk has been set in the head inasmuchy as the protruding lugs serve to spacejthis balancing ring slightly from the walls ,of the recess that receives the disk. A file may be inserted in this space and enough 4material filed off thematerial of the balancing ring to compensate for the material that has of the lugs. Y

What I claim is f A grinding disk comprising a flat surface having a plurality of ribs, baffles lobeen trimmedL olf cated in the grooves formed by the ribs, saidV baffles gradually rising in heightfrom the center toward the periphery of the disk, j i 100 Copies of this patent may be obtained for Washington, D. C.

ve cents each, by addressing the v Commissioner of Patents, i 

